Hydrometer-syringe



E. NEERUP.

HYDROMETER SYRINGE.

APPHCATION FILED SEPT- 18. I919.

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Patented Feb. 1; 1921. v

UNITED STATES PATENT OFFICE.

EIN'AR NEERUP, OF CHICAGO, ILLINOIS.

HYDROMETER-SYRINGE.

Application filed September tural formation and arrangement of parts of improved construction in \such devices .whereby frictional resistance to the free movement of the hydrometer within the chamber of the syringe is reduced to a minimum and a correct indication afforded during continued use, all as 'will hereinafter more fully appear.

In the accompanying drawings:'

Figure 1, is a side elevation illustrating the application of the invention to an ordi nary form of hydrometer syrirfge.

Fig. 2,"is a detail perspective view of the hydrometer.

'Similar reference numerals indicate like parts in both views. I

Referring to the drawing, 1 designates the main casing of the syringe formed of glass or like transparent material and preferably of the cylindrical form shown.

2'designates the usual operating bulb arranged at the upper end of the casing 1, and 3 designates the, usual flexible inlet-outlet tube secured to the lower end of said main casing.

A hydrometer is arranged within the easing 1 and adapted to move freely therein with a corresponding influx of the fluid to Specification of Letters Patent.

18, 1919. Serial No. 324,411.

be tested into the containing chamber formed by said casing.

5 designates a plurality of strengthening, or reinforcing rings secured in spaced relation to the plain surface or periphery of the bulb 4 of the hydrometenthe said rings being provided, or formed, witha plurality ,of radial spacing lugs or projections 6 f b which are adapted to bear against the inner wall or surface of the casing l to guide the hydrometer in its vertical movement with a minimum amount of frictional resistance to such movement.

Patented Feb 1, 1921.-

With the present construction the rings 5 I also serve as a guard or protector for the bulb wall or shell of the hydrometer against breakage in handling and shipment, and owing to their separate nature from, and subsequent attachment to said bulb, the

weakening and inaccuracies caused by the older formation of bearing points integrally in the shell or wall thereof, is avoided and at the same time greater accuracy and economy in manufacture is attained.

aving thus fully described my said inbear against the inner wall of the syringe with which the hydrometer is employed so as to guide the hydrometer in its vertical movement with a minimum'amount of frictional resistance to. such movement.

Signed at Chicago, Illinois, this 15th day of September, 1919.

EINAR N EERUP. 

